Many polar-dwelling fishes have "antifreeze proteins" that prevent their bodies from freezing solid
even at very low temperatures. Briefly describe how these proteins function.
What will be an ideal response?
"Antifreeze proteins" are small molecules containing 30?50 amino acids. They bind to ice crystals and
cover them with a protein coat that prevents further crystallization.
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Activation of which of the following is associated with the formation of focal adhesions and stress fibers?
A) Rho B) Ras C) Cdk-42 D) intermediate filaments E) ?-tubulin
Which stage of infection is characterized by host deterioration and possibly death?
a. Prodromal b. Clinical c. Decline d. Convalescent
Choose the organelle in column 2 that best matches the activity in column 1
A) mitochondria B) rough endoplasmic reticulum C) lysosome D) Golgi E) smooth endoplasmic reticulum F) peroxisomes G) plant vacuole 1) catalase 2) N-linked glycosylation 3) cytochrome P-450 4) glycosyl transferases 5) drug detoxification 6) acid hydrolases 7) turgor pressure
Most of the photosynthetic activity in plants takes place in the
a) mesophyll. b) guard cells. c) stomata. d) xylem.